focused on america's leadership in the world. >>> meanwhile, president obama sent vice president biden to do some christmas shopping, sort of. he went to a suburban costco to talk about the fiscal cliff and tax cuts. he took photos with shoppers, chatted up the staff and was followed around the store by a huge crowd. his favorite part, like many of us who go to costco, all those free samples. he did get around to talk tax cuts. >> i think it's important that congress acts now. i mean, right now. all that needs to be done is extend the middle class tax cut. >> he bought cookies, children's books, an apple pie and a 32 inch tv. he declined an offer to buy a set of tires saying, i don't drive any more. >>> the driver behind the crash has a bizarre explanation for why it happened. >>> good evening, i'm chief meteorologist jeff ranieri in the bay area weather center. we're tracking the latest storm moving across california. a flash flood watch. and if you're headed to the sierra, watch out, winter storm warning in place, where we could see six to ten inches on your full forecast coming up.